monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1771.397797] add      /devices/virtual/bdi/8:48 (bdi)
ACTION=add
DEVPATH=/devices/virtual/bdi/8:48
SUBSYSTEM=bdi
SEQNUM=8419
USEC_INITIALIZED=1771397357